1. Open Terminal (Applicationes > Utilities > Terminal.app) 
2. Write the following: “defaults write com.apple.Finder AppleShowAllFiles YES” and hit Enter. Don’t close the Terminal you’ll need it in the next step…
3. Restart Finder. You can achieve this by writing the following command: “killall Finder”
Now you’re able to see all the hidden files and folders in Finder.
To hide the [...]